感謝大家的回覆!
的確是與電路有關,發現是燒錄時電壓需維持5V以上,我的電路是4.9V,因此一直出問題.

現已將電壓回復至5V以上,問題已解決!

哎呀!我確實確認過Configure-->Select Device的型號是PIC16F57,我是透過ICD2給電,也量過電源供應是5V,
但還是出現上列訊息?

是否ICD2 progrmming 時,震盪器起振與否可以忽略?

當我程式build成功後要將code燒進PIC16F57時,出現以現訊息

MPLAB ICD 2 Ready
Connecting to MPLAB ICD 2
...Connected
Setting Vdd source to MPLAB ICD 2
...Reading ICD Product ID
Running ICD Self Test
...Passed
MPLAB ICD 2 Ready

此訊息代表我連線正確,但是當我要燒錄程式時,出現以下訊息

Programming Target...
ICDWarn0052: MPLAB ICD 2 cannot validate a target device. Please make sure that the target device is connected and properly powered. Select "OK" to continue, or "CANCEL" to abort the operation
...Validating configuration fields
...Erasing Part
...Programming Program Memory (0x0 - 0x7FF)
...Programming User IDs
Verifying...
ICDWarn0052: MPLAB ICD 2 cannot validate a target device. Please make sure that the target device is connected and properly powered. Select "OK" to continue, or "CANCEL" to abort the operation
...Program Memory
ICD0161: Verify failed (MemType = Program, Address = 0x0, Expected Val = 0xC00, Val Read = 0x0)
ICD0275: Programming failed.
MPLAB ICD 2 Ready

結果燒錄失敗?
尤其是一直出現ICDWarn0052的錯誤訊息...
請問哪裡可能發生問題??